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Temporal and Spatial Distribution Characteristics of Fish Resources in a Typical River-Lake Confluence Ecosystem During the Initial Period of Fishing Ban

文献类型： 外文期刊

作者： Li, Huifeng 1 ; Yu, Xujun 4 ; Wu, Bingbing 1 ; Yu, Lixiong 5 ; Wang, Dengqiang 5 ; Wang, Ke 5 ; Wang, Sheng 6 ; Chen, Daqing 5 ; Li, Yuefei 1 ; Duan, Xinbin 5 ; Li, Jie 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Guangzhou 510380, Peoples R China

2.Key Lab Aquat Anim Immune Technol Guangdong Prov, Guangzhou 510380, Peoples R China

3.Natl Fisheries Resources & Environm, Guangzhou Sci Observing & Expt Stn, Guangzhou 510380, Peoples R China

4.Beijing Cent Ring Geyi Technol Consultat Co Ltd, Beijing 100041, Peoples R China

5.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Minist Agr & Rural Affairs, Fishery Resources & Environm Sci Expt Stn Uppermid, Wuhan 430223, Peoples R China

6.Dept Agr & Rural Affairs Jiangxi Prov, Nanchang 330000, Peoples R China

关键词： hydroacoustics; fish distribution; spatial and temporal variation; fishing ban; biodiversity conservation

期刊名称：FISHES （ 影响因子：2.4； 五年影响因子：2.4 ）

ISSN：

年卷期： 2024 年 9 卷 12 期

页码：

收录情况： SCI

摘要： This study provides a comprehensive analysis of the spatio-temporal dynamics of fish resources in the confluence waters of Poyang Lake and the Yangtze River, focusing on the initial phase of a 10-year fishing ban implemented in January 2020. Through hydroacoustic surveys conducted during both high-water (September 2020) and low-water (January 2021) periods, we identified significant variations in fish density and individual size across different sections. During the high water level period, fish concentrations were primarily observed in the confluence area between the Yangtze River and Poyang Lake, exhibiting higher densities compared to other regions. Conversely, fish congregated in the deep-water zones of the main river during the low water level period. The fish population was dominated by small to medium-sized individuals, with mean body lengths of 12.47 cm and 12.62 cm during the high and low water level periods, respectively. Notably, 42 and 33 fish species were recorded during the high-water and low-water surveys, respectively, emphasizing the region's rich biodiversity. Importantly, the study demonstrates that the fishing ban has resulted in substantial increases in both fish density and mean body length, underscoring its effectiveness in fostering fish population recovery. These findings provide critical baseline data to inform scientific conservation and management strategies in this ecologically sensitive river-lake ecosystem.

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